Von Neumann

Von Neumann

1. Program counter

   • Stores the address of the next instruction to be run

2. Accumulator

   • Stores the intermediate results of a calculation

3. Current Instruction Register

   • Stores the instruction currently being executed

4. Memory Address Register (MAR)

   • Stores the memory address where the data or instruction will be fetched/written

5. Memory data register

   • Stores the data or instruction which is being fetched/written from/to memory

6. Components

   • Control unit (CU)
     • Controls the flow of data between the CPU and other parts of the computer system.
   • Cache
     • Stores frequently used instructions for the CPU.
   • Arithmetic and logic unit (ALU)
     • The arithmetic logic unit performs all the calculations for the CPU